Regular and irregular shapes cutting machine



y 3, 1950 I J. T. STONE 2,508,730

REGULAR AND IRREGULAR SHAPES CUTTING MACHINE Filed Aug. 28, 1944 v 2 SheetsSheet 1 y2 50 J. T. STONE I I 2,508,730

REGULAR AND IRREGULAR SHAPES CUTTING MACHINE Filed Aug. 28; 1944 h 2 Sheets-Sheet 2 J I Jb/m 7157-0 Patented May 23, 1950 REGULAR AND IRREGULAR SHAPES CUTTING MACHINE John T. Stone, Baltimore, Md; 7

'Application'August 28, 1944, Serial No. 551,549

This invention refers to cutting machines and more especially to a-device for'cutting irregular or regular shapes in materialhaving a flat surface on which to'work. It has among its objects toprovide. a simple structure for reproducing materialaccording to selected templets. attached thereto. Another object is to have the machine adapted for making regular outlines without-the use of a templet. A further object is to provide for adjustability of the parts of the device so that. it can be flexibly arranged for variable conditions and requirements. Still another object is to have the device adaptable for use for layouts and other incidental uses that may be obvious to those skilled in the art. Portability of the device is another object of the invention, as well as having particular adaptability for use with welding torchesand the like.

Other objects will become apparent a the invention is more fully set forth.

The machines fordoing cutting in plates and other fiat surfaces in accordance with designated templets are somewhat restricted in their scope by reason of their relatively intricate construction and functioning. In this device, the tem-" plets may be attached quickly without any appreciable troubler The" other adjustments may be made by sliding parts on bars until they are positioned to suit. The structure consists mainly of a column with an arm extending therefrom carrying the parts that do the work and provide for the adjustments referred to.

In the drawings is shown a form of this invention, by way of example to illustrate the principles employed in devices embodied in this invention. In these drawings:

Figure 1 is a plan view of a form cutting machine embodying this invention;

Figure 2 is a side elevation of the device shown in Figure 1 partly in section and with cutting torch attached to the tool post;

Figure 3 is an end elevation of the device shown in Figure 1 with the torch holder removed;

Figure 4 is a plan view of the rotating arm and cam mechanism taken along line 4-4 of Figure 2;

Figure 5 is a view similar to Figure 4 giving a diagrammatic view of the rotating arm and cam roller in various positions assumed during one complete revolution around the cam for cutting or punching irregular shapes;

Figure 6 is a view of the rotating head in section showing method of centering same with the tool post for cutting or marking circles; and

1 Claim. (01. .ss z'z) Figure 7 isan enlarged v plan view of thetool post slide head showing centering hole.

Similar reference characters refer to similar partsthroughout the drawings.

In the structure shown in the drawings vHlrepresents abase on which ismounted a stationary vertical column II which carries a spindle arm l2 radially out from the column. The arm l2is raised and loweredvertically in slots [3 in the column through the rotationof. a jack-screw l4 through screw-threads. I5 provided inthe portion of the spindle armin the column. Thebottom portion of thejack-screw l4 issupported in a bearing cup I lfi-formed integral in the base [0; Bolts I! are used ,for attaching the column to the base and-to allow the'columnto be rotated to various positions on-base. Atthe outer end portion ill of the spindle arm I2 is provided a box member I9 shoWn rectangular in form,. and

with a hole 20 through it It has acover 2|-to protect the worm gear 22 and operating worm 23 therefor. The-"worm gearv .22 is integrally connected to a hollow shaft 24 which extends through the hole ZUdownwardlybelowthe spindle arm IZand-has aradial arm 25 extending out from it andpreferably" of rectangular crosssection. This arm25, carries the cuttingandlay out equipment. This part of the device will be referred to more in detail in a later part of the description. Passing through the cover 2| and worm gear 22 is a hollow pipe like piece 26 held stationary to the cover by a set-screw 21. An inverted bracket 6! is provided on the lower portion of this piece 26. An elongated pin 28 passes down through the passage 29 in the part 26. This pin is utilized when it is desired to centralize the work on the machine. The bracket 61 supports the templet cam 30 removably by means of the bolts 3|. A roller 32 makes peripheral contact with the templet cam 30 and is carried completely around same when in operation, by the head bracket 33 which is of channel-like form and arranged to hold a welding torch element 34, and prick punch arrangement 35. The spring 36 and cam head 31 serves to give the prick punch a tapping action in a conventional manner. This cam head is operated through a shaft 68 on which it is mounted and with which it rotates. This shaft 68 is operated by a, motor 38 as indicated. The operating arm 39 is hollow and supports the shaft 68 Within so it can revolve therein. This arm 39 also supports the motor 38. The arm 25 adjustably and slidably holds a collar member 43. The set-screw 44 holds it at any location on the arm 25. The post 45 and collar 46 serve I bracket 4| to support a bifurcated bracket 4| in any rotative position on the post and this lbracket can be secured in that position with a set-screw 4'1 when a circular cut is made. A spring 42 is normally used (with the set-screw 41 loosened) to place a tension on the arm 39, primarily to keep the roller 32 against the periphery of cam 30. The arm 39 is supported by the bracket as indicated in Figure 2 and after adjustment held in place by the set-screws 48.

In operation the worm 23 is rotated by a handle 49 extending out of the side of the box member I 9. The rotation of the worm 23 causes the worm gear 22 to rotate with its shaft 24. This in turn carries the arm 25 around with the bracket 4| and its connections attached to it. The latter carries the arm 39 and makes roller 32, which is connected with it, follow the periphery of the cam 30, which makes the welding torch 34 cut a piece out of the plate '50 to be so treated. The spring 42 .attached to the collar member 43 pulls around and resiliently allows the roller 32 to follow the contour of the cam templet 30, and carry the torch likewise. The cut follows the contour of the cam 30 and may be larger or smaller according to position of the roller 32 in the head 33 in the slot 53 with regard to the center post 52 over the center line of the torch 34.

The head is indicated in Figure '7. When the prick punch arrangement 315 i employed for pricking out an outline in the plate, the torch and its set-screw and holder 59 are swung out of the way and the mechanism 35 lowered by lowering arm l2 through the turning of the jackscrew l4 to suit. If the device is to be used for cutting a circular hole in the plate, the position of the torch (or prick punch) is adjusted to bring it and its holder to the proper or selected radius from the centerline of the worm gear by pushing the mechanism along the arm 25 to suit. The

set-screw 41 is tightened in place. This allows the torch to be rotated around this center line as if it were directly attached to the arm 25. When the spring 42 is used, it enables the arm 39 to adjust itself to the travel of the roller 32 on the cam templet, and when the prick punch 4 while the motor 38 operates to mark the plate accordingly, through its connection to the shaft 68 and hammer cam 31. The adjustment of the arm 39 in the bracket 4| can be made to suit the conditions requiring it.

While but one general form of the invention is shown in the drawings and described in the specifications, it is not desired to limit this application for patent to this particular form, as it is appreciated that other forms of construction could be made that would use the same principles and come within the scope of the appended claim.

Having thus described the invention, what is claimed is:

A machine of the type described comprising a base, a column mounted on said base, said column having parallel slots in the wall thereof, a screw supported in said base and within said column, a spindle arm in threaded engagement with said screw and guided in said slots, a gear housing at one end of said spindle arm, a worm and a cooperating worm gear supported in said housing, a, bracket carried by said housing, a cam carried by said bracket, a tool in operative engagement with said cam, means for adjustably mounting said tool on said worm gear whereby said tool rotates with said worm gear when the worm gear is rotated, and means for rotating said worm.

JOHN T. STONE.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 260,783 Proctor July 1-1, 1882 1,201,686 Bugbee Oct. 17, 1916 1,582,033 Godfrey Apr. 27, 1926 2,223,720 Doyle Dec. 3, 1940 2,252,146 Walsh Aug. 12, 1941 2,377,844 Stone June 5, 1945 2,388,376 Young Nov. 6, 1945 FOREIGN PATENTS Number Country Date 114,462 Great Britain Apr. 2, 1918 

